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PDF TA8254BHQ Data sheet ( Hoja de datos )
| Número de pieza | TA8254BHQ | |
| Descripción | 45W BTL X 2CH AUDIO POWER AMPLIFIER | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TA8254BHQ
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8254BHQ
Max Power 45 W BTL × 2 ch Audio Power IC
The TA8254BHQ is BTL stereo audio power amplifier for car
audio application, especially for 2 Ω load impedance.
It is built-in Stand-by Function, Muting Function, diagnosis
circuit output clipping detector and various kind of protections.
Features
• High power
: POUT (1) = 45 W (typ.) /channel
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 2 Ω)
: POUT (2) = 35 W (typ.) /channel
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 2 Ω)
: POUT (3) = 21 W (typ.) /channel
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
Weight: 4.0 g (typ.)
• Low distortion ratio
: THD = 0.02% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 10 W, RL = 4 Ω)
• Low noise
: VNO = 0.10 mVrms (typ.)
(VCC = 13.2 V, RL = 4 Ω, Rg = 0 Ω, BW = 20 Hz to 20 kHz)
• Built-in stand-by function
: (with pin set at LOW, power is turned OFF) ISB = 1 µA (typ.)
• Built-in output clipping detection and diagnosis circuit
: (open collector (active LOW))
• Built-in various protection circuits
: Thermal shut down, over voltage, OUT → VCC short, OUT → GND short and OUT-OUT short.
• Operating supply voltage: VCC (opr) = 9 to 18 V
1 2004-09-28
1 page  
TA8254BHQ
3. Muting Function (pin 1)
By means of controlling pin 1 less than 0.5 V, it can make the audio muting condition.
The muting time constant is decided by R1 and C4 and these parts is related the pop noise at power
ON/OFF.
The series resistance; R1 must be set up less than 15 kΩ, we recommend 10 kΩ.
The muting function have to be controlled by a transistor, FET and µ-COM port which has IMUTE >
250 µA ability.
pin 1 must not be pulled up and it shall be controlled by OPEN/LOW.
I (100 µA)
IMUTE (OFF)
1
R1 A
IMUTE
VMUTE
Figure 4 Muting Function
ATT – VMUTE
20
0
−20
R = 15 kΩ
−40
10 kΩ
5 kΩ
−60
−80
−100
0
VCC = 13.2 V
f = 1 kHz
RL = 4 Ω
VOUT = 20dBm
0.4 0.8 1 1.2 1.6 2 2.4 2.8 3
Point A voltage: VMUTE (V)
Figure 5 Mute Attenuation − VMUTE (V)
5 2004-09-28
5 Page 
3
VCC = 13.2 V
1 RL = 4 Ω
POUT = 10 W
0.3
T.H.D – f
0.1
0.03
0.01
0.003
0.001
10
100 1 k 10 k
Frequency f (Hz)
100 k
TA8254BHQ
3
VCC = 13.2 V
1 RL = 2 Ω
POUT = 20 W
0.3
T.H.D – f
0.1
0.03
0.01
0.003
0.001
10
100 1 k 10 k
Frequency f (Hz)
100 k
POUT – f
25
20
THD = 10%
15
0.8%
10
5
VCC = 13.2 V
RL = 4 Ω
0
10 100 1 k 10 k 100 k
Frequency f (Hz)
GV – f
40
35
30
25
20
15
10
5 VCC = 13.2 V
RL = 4 Ω
0
10 100 1 k 10 k 100 k
Frequency f (Hz)
200
VCC = 13.2 V
RL = 4 Ω
160 BW = ~20 k
VNO – Rg
120
80
40
0
0.1 1 10 100 1 k 10 k 100 k
Signal source resistance Rg (Ω)
POUT – VIN
30
20
10
VCC = 13.2 V
RL = 4 Ω
f = 1 kHz
0
0 0.1 0.2 0.3 0.4 0.5
Input voltage VIN (Vrms)
11 2004-09-28
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TA8254BHQ.PDF ] | |
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